1、I eiJB WORLDWIDE STANDARD WA 961 DATE: 1996 JULY Material, Physical Properties and Performance of Pierce Studs 1. SCOPE. This standard covers the material, physical properties and performance requirements of self piercing studs in the range M5 to M 10 inclusive. 1.1 REFERENCE. IS0 3573 - Hot-rolled
2、carbon steel sheet of commercial and drawing qualities. IS0 3574 - Cold-reduced carbon steel sheet of commercial and drawing qualities. MATERIAL AND PHYSICAL PROPERTIES. The material and physical properties for pierce studs shall be in accordance with WA950 Property Class 8.8. GENERAL. Studs shall b
3、e capable of piercing their own hole in a test plate as described in Clause 5. After assembly parts shah be perpendicular to the test plate within 1 degree. Stress cracks radially orientated on the coined barrel of the stud after assembly are permissible provided the assembled stud meets all other r
4、equirements of the specification. PERFORMANCE. NOTE: In all tests, damage pertains to stud loosening, panel distortion is allowable. 4.1 PUSH-OUT. After assembly in a steel sheet panel of the thickness specified in Table 1 the assembly must be placed on a test rig as shown in Figure 1 and a load app
5、lied in the direction shown. The assembly must withstand the push-out load specified in Table 1 without loosening in the panel, or showing evidence of damage when examined at 1 Ox magnification. 4.2 PULL-OUT. After assembly in a steel sheet panel of the thiclmess specified in Table 1 the assembly mu
6、st be placed in a test rig as shown in Figure 2 and a load applied in the direction shown. The assembly must withstand the pull-out load specified in Table 1 without loosening in the panel, or showing evidence of damage when examined at 1 Ox magnification. 4.3 4.4 NOTE: For non-destructive testing o
7、f production parts, only pull-out test is required. TORQUE-TO-TURN. After assembly in a steel sheet panel of the thickness specified in Table 1 the assembly must be placed in a test rig as shown in F&we 3 and a torque applied in the direction shown. The assembly must withstand the torque-to-turn loa
8、d specified in Table 1 without turning or loosening in the panel. IN-PLACE DIMENSIONS. Figure 4 and Table 2 show the in-place dimensions. (GiiiBB WORZIDWIDE STANDARD WA 961 DATE: 1996 JULY Material, Physical Properties and Performance of Pierce Studs 5. TEST PLATE. I The test plate shall be 0.2% max
9、imum carbon steel to IS0 3573 or IS0 3574 and thickness as specified inTable 1. Table 1. Nominal Size Test Plate Thickness t* Minimum Push-Out kN Minimum Pull-Out kN Minimum Torque-to-Turn m h45 1 1 +/-0.08 1 1.0 1 1.0 ( 7.4 M6 I 1 +I- 0.08 I 1.0 I 1.0 I 12.4 M8 1 +I- 0.08 1.0 1.0 Ml0 1 +!- 0.08 1.0
10、 1.0 : NOTE: For production testing, use actual production parts. 30.0 60.0 Figure 1. APPLIED LOAD + MATERIAL CLAMP PLATE t- 0B I HARDENED BLOCK WITH HEAD OF STUD CENTRALLY LOCATED NOTE: DB = PP +2t + 3mm PAGE 2 OF 4 e&m WORLDWIDE STANDARD WA 961 DATE: 1996 JULY Material, Physical Properties and Per
11、formance of Pierce Studs Figure 2. APPLIED LOAD MATERIAL J : r CLAMP PLATE I l- 0B NOTE: pIB = $i5P + 2t + 3mm HARD&ED BLOCK WITH HEAD OF STUD CENTRALLY LOCATED Figure 3. APPLIED TORQUE a I THIC PLATE HARD&ED BLOCK WITH HEAD OF STUD CENTRALLY LOCATED Note: 06 = 0P + 2t + 3mm PAGE 3 OF 4 w WORLDWIDE
12、STANDARD # WA 961 DATE: 1996 JUL,Y Material, Physical Properties and Performance of Pierce Studs Figure 4. Table 2. Metal Thickness 0.75 - 1.24 1.25 - 1.74 1.75 - 2.00 1.75 - 2.25 1.75 - 1.99 2.00 - 2.50 MS M6 MS Ml0 X R X R X R X R 4.8 14.5 4.9 14.9 5.8 18.0 6.9 22.4 4.7 14.9 5.1 14.9 5.4 18.5 6.6 23.1 4.7 15.2 4.7 15.0 5.1 19.5 6.4 24.0 6.1 25.2 PAGE 4 OF 4
